package com.csx;

import java.math.BigDecimal;
import java.time.*;
import java.time.format.DateTimeFormatter;
import java.time.temporal.ChronoUnit;
import java.time.temporal.TemporalUnit;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * @author 陈胤训
 * <p>
 * create: 2019-04-11 10:43
 **/
public class LocalDateTimeUtils {


    //Date转换为LocalDateTime
    public static LocalDateTime convertDateToLDT(Date date) {
        return LocalDateTime.ofInstant(date.toInstant(), ZoneId.systemDefault());
    }

    //LocalDateTime转换为Date
    public static Date convertLDTToDate(LocalDateTime time) {
        return Date.from(time.atZone(ZoneId.systemDefault()).toInstant());
    }


    //获取指定日期的毫秒
    public static Long getMilliByTime(LocalDateTime time) {
        return time.atZone(ZoneId.systemDefault()).toInstant().toEpochMilli();
    }

    //获取指定日期的秒
    public static Long getSecondsByTime(LocalDateTime time) {
        return time.atZone(ZoneId.systemDefault()).toInstant().getEpochSecond();
    }

    //获取指定时间的指定格式
    public static String formatTime(LocalDateTime time,String pattern) {
        return time.format(DateTimeFormatter.ofPattern(pattern));
    }

    //获取当前时间的指定格式
    public static String formatNow(String pattern) {
        return  formatTime(LocalDateTime.now(), pattern);
    }

    //日期加上一个数,根据field不同加不同值,field为ChronoUnit.*
    public static LocalDateTime plus(LocalDateTime time, long number, TemporalUnit field) {
        return time.plus(number, field);
    }

    //日期减去一个数,根据field不同减不同值,field参数为ChronoUnit.*
    public static LocalDateTime minu(LocalDateTime time, long number, TemporalUnit field){
        return time.minus(number,field);
    }

    /**
     * 获取两个日期的差  field参数为ChronoUnit.*
     * @param startTime
     * @param endTime
     * @param field  单位(年月日时分秒)
     * @return
     */
    public static long betweenTwoTime(LocalDateTime startTime, LocalDateTime endTime, ChronoUnit field) {
        Period period = Period.between(LocalDate.from(startTime), LocalDate.from(endTime));
        if (field == ChronoUnit.YEARS) return period.getYears();
        if (field == ChronoUnit.MONTHS) return period.getYears() * 12 + period.getMonths();
        return field.between(startTime, endTime);
    }

    //获取一天的开始时间，2017,7,22 00:00
    public static LocalDateTime getDayStart(LocalDateTime time) {
        return time.withHour(0)
                .withMinute(0)
                .withSecond(0)
                .withNano(0);
    }

    //获取一天的结束时间，2017,7,22 23:59:59.999999999
    public static LocalDateTime getDayEnd(LocalDateTime time) {
        return time.withHour(23)
                .withMinute(59)
                .withSecond(59)
                .withNano(999999999);
    }


    public static void main(String[] args) {
        LocalDateTime now = LocalDateTime.now();

        LocalDateTime dayEnd = LocalDateTimeUtils.getDayEnd(now);
        System.out.println(now.toLocalDate());

        //获取秒数
        Long second = LocalDateTime.now().toEpochSecond(ZoneOffset.of("+8"));
//获取毫秒数
        Long milliSecond = LocalDateTime.now().toInstant(ZoneOffset.of("+8")).toEpochMilli();
        System.out.println(second);
        System.out.println(milliSecond);


        System.out.println(LocalDateTimeUtils.getMilliByTime(now));
        System.out.println(LocalDateTimeUtils.getSecondsByTime(now));
        System.out.println(ZoneId.systemDefault());
        System.out.println(ZoneOffset.of("+8"));
        LocalDateTime date = LocalDateTime.of(2019, 5, 7, 0, 0);
        LocalDateTime start = LocalDateTime.of(2018, 7, 24, 0, 0);
        LocalDateTime end = LocalDateTime.of(2018, 7, 24, 23, 59);
        boolean after = date.isAfter(start);
        boolean before = date.isBefore(start);
        String format = LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd"));

        int i = date.compareTo(LocalDateTime.now());

        System.out.println(i );
    }
}
